Sink strainer



p 5 I A. H. WEDDENDORF, JR 2,905,951

SINK STRAINER Filed July 5, 1955 INVENTOR. ALBERT HENRY WEDDENDORFJR BYATTORNEYS United States Patent 2,905,951 SINK STRAINER Albert HenryWeddendorf, Jr., Hamilton County, Ohio Application July 5, 1955, SerialNo. 519,956

2 Claims. 01. 4-287) My invention relates to drains and particularly toa kitchensink drain.

It is the object of the invention to provide a readily manufactured,economical and versatile drain adapted to be easily installed, easilycleaned and of such rugged construction as to be a permanentinstallation in a sink.

It is an object of this invention to provide a drain construction inwhich the component parts could be manufactured with a minimum toolingbut with such precision that the formation of the parts would be of suchaccuracy that in mass production the parts would be interchangeable.

It is a further object to provide a construction in which the metalshells would act as locking devices and as valve supports in conjunctionwith the strainer.

It is an object of this invention to be able to position the strainerand the valve carried by the strainer by a simple adjustment.

It is a further object to provide an economical, simple means ofinstallation or removal for replacement.

It is an object of the invention to provide a strainer and valveconstruction either in one piece or in two pieces positioned in an outershell adjustable either for sealing the drain or for permitting drainagethrough the drain from the sink.

It is a further object of this invention to provide a strap-onconstruction of rugged character, but of such nature that it would beeasily locked or unlocked together.

One of the principal advantages of this invention is the ease ofassembly and disassembly and the ease of mounting and dismounting in asink.

These and other objects and advantages will become more apparent uponreference to the following description taken in connection with theaccompanying drawings, in which:

Figure l is an isometric View of a kitchen table sink and the top of thedrain which is the subject of this invention;

Figure 2 is a section on the line 22 of Figure 1;

Figure 3 is a modified form of the valve construction;

Figure 4 is another modified form of the drain and valve construction;and

Figure 5 is an isometric view of the locking mechanism between the draintube and the assembled drain mechamsm.

Referring to the drawings in detail, a sink 1 is mounted in a table ordrainboard 2. The sink is provided with a central drain aperture inwhich the subject matter of this invention is located. The supportingshell of the combination is generally designated 3. It consists of theupper overlapping flange 4 mounted on the resilient ring 5 which restson the bottom of the sink 1. This shell depends in the opening 6 inwhich the mechanism is installed. The side wall of the shell iscorrugated to form one-half of a locking screw 7. This portion of thescrew 7 is at the upper end of the shell.

As will be explained later, this screw is engaged by a companion memberon the rotatable strainer shell 8.

Patented Sept. 29, 1959 The lower portion of the supporting shell isprovided with grooves acting as one-half of a locking screw to receivethe nut 9 which inter-engages with the screw threads 10 of thesupporting shell.

The lower portion of the supporting shell 3 converges inwardly anddownwardly as at 11 to form a valve seat 12 upon which rests a valvemember supported by the shell 8. This valve member in Figure 2 is acontinuation of the shell 8 and in Figures 3 and 4 it comprises theplate valve 13 supported by the stem 14 on the drain bottom 15 of thedrain shell 8.

In the preferred form the strainer shell 8 is corrugated to form a screwthread 16engaging with the screw thread 7 of the supporting shell. Ports17 act as drains. The water or other material passing therethrough canmake an exit if the shell 8 is rotated and elevated so that thedepending ,valve shell portion of the shell, can be lifted fromengagement with the valve seat 11(a) forming the lower portion of thesupporting outer shell.

This supporting outer shell is crimped at intervals at 18.1 The crimp inthe side Walls is just above the in wardly turned supporting portion 19which has the following function:

The drain tube 20 which connects the supporting shell and strainer shellwith the discharge pipe 21 is provided with an outwardly turned flange22 resting on the gasket 23 supported by the inwardly turned flange 19.

In order to lock this assembly together, the annular locking plate 24,which has notched portions 25, is pressed into position on top of thedrain tubes 20 flange 22 with the notched portions 25 aligned with thecrimps 18 and then the plate 24 is rotated into a position ofnonalignment of the notched portions 25 and crimps 18 i.e., a positionin which portions of the plate 24, intermediate the notches, abut theundersides of crimps 18.

The lower end of the drain tube which is slidably mounted within thedischarge line 21 is embraced by the 0 ring 26 within the locking ring27 threaded at 28 on the outside of the drain pipe 21.

The strainer shell has a strap 29 mounted on top so as to facilitaterotation of the strainer shell. A button 30 is provided on this strap tofacilitate this roation and the lifting of the strainer shell.

It will be apparent that the combination consists of the supportingshell, the interlocking strainer shell with a valve memberintermittently engageable with the lower portion of the supporting shellto control the flow of liquid and material therethrough from the drainto the drain pipes 20 and 21.

In Figure 4, the locking nut 9 is directly opposite the upper screwthreads 7 and 16.

Operation In assembling this drain mechanism, the supporting shell isplaced in position in the aperture in the bottom of the sink '1, thedrive tube 20 is then put into position by being inserted in the bottomaperture of the supporting shell at 19(a). The washer 23 has alreadybeen put into position on the shoulder 19. The flange 22 of the draintube 20 then engages the top of the washer, the lock ring 24 is thenpressed into position and rotated into locking position. The lower endof the drain tube is inserted and locked into the plumbing at 21.

The strainer shell 8 is then screwed into position and the locking nut 9is also rotated into locking position. The adjustment of the strainershell determines. whether there will be direct flow from the sink to thesewer or whether the water will be kept in the basin 1 due to theengagement of the valve shoulder 10 of the strainer shell with thesupporting shell 3 as at 11, or whether the plate 'valve 13 is inengagement with the shoulder 11(a) of the supporting shell.

The constructionconsists of the basic parts of the ppo t ng she l whi hvupports the d ai tub in c ed position and which acts as a support forthe strainer shell and its valve memben. The two shells together a t. sh h v s f a valve Q on ol ing e ow o liquid and other materials from thesink into the sewer.

It will be understood that this invention is susceptible to modificationin order to adapt it to different usages and conditions, and,accordingly, it is desired to comprehend such modifications within thisinvention as may fall within the scope of the appended claims.

I claim:

1. In a drain for a sink, the combination of a flanged,

corrugated supporting shell, said corrugation formingim.

ner and outer threads on the side walls, means on the supporting shellbelow the threaded side wall forming a valve seat, means on the lowerend of said supporting shell to form a support for a drain tube, aperforated strainer shell located within said supporting shell andhaving a threaded outer side wall in threaded engagement with said innercorrugated side wall of the supporting shell, means on the bottom ofsaid strainer shell forming a valve, said valve cooperating with saidvalve seat the bottom of the supporting shell to be opened and closed byrotation of the strainer shell within the supporting shell, means todetachably lock said drain tube in the bottom of said. supporting shell,and means engaging the outer corrugated side wall for clamping same to asupport.

2. The combination in accordance with claim 1, in which the means todetachably lock said drain tube in the bottom of a supporting shellincludes crimp portions formed in said supporting shell adjacent thebottom free end thereof at spaced intervals therearound, a flangeportion on the upper free end of said drain tube and a locking platesupported by said flange, said looking plate being provided with aplurality of spaced crimp portions which, upon rotation, will interlockwith the crimp portions in said supportingshell, to lock the drain tubeinto position.

References Cited in the file of this patent UNI ED ST TES ATEN S1,820,673 Oakley Aug.- 25, 193 1- 2 ,225,69'3 Frances Dec. 24, 19402,278,566 Schaible Apr. 7, 1942 2,279,683 Iudell et al. Apr. 14, 19422,569,615 Link Oct. 2, 1951 2,702,565" Moritz et a1. Feb; 22, 195-5

